1、城市无论大小都应该保持清洁。 
　　 2、保持城市清洁不是一件容易的事。 
　　 3、为了保持城市的清洁，我们的政府做了大量的工作。 
　　 Keep Our City Clean 
　　 A city, whether small or big, should be kept clean. A clean environment will do us much good. Without the clean environment, we can hardly keep fit, work efficiently or live a comfortable life, which will greatly hold back the development of the city. So it’s of great importance to keep our city clean. 
　　 Moreover, keeping the city clean is not an easy job. We can clean up the city and keep it clean temporarily, but can we keep it clean for good? This arduous work is in close relation to the economy of the city, the government policy and citizens’ qualities. It demands permanent efforts and scientific measures and right attitudes. 
　　 In order to keep the city clean, our government has taken a great 
　　 many steps, which includes proper investment, making plans and regulations, the disposal of rubbish, the forestation, and the layout of gardens and flower beds and lawns. We can expect a clean and beautiful city as long s all of us do what we should under the leadership of the government.